Sun Wu was an outstanding strategist in the late Spring and Autumn Period. His work, Sun Zi's Art of War, was the most famous work of military science in ancient China, also the earliest one existing in the world. Sun Zi's Art of War consists of 13 characters. In this limited space, Sun Wu elaborated his wide-ranging views on war. He put forward many military philosophies, such as knowing yourself and knowing your enemy, and concentrating superior force to thoroughly defeat the enemy. Sun Zi's Art of War has been translated into many different languages and enjoys a high international reputation.